106 lines
2.7 KiB
C++
106 lines
2.7 KiB
C++
#include "Base64.h"
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#include <iostream>
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namespace coreutils {
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const std::string base64_chars =
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"ABCDEFGHIJKLMNOPQRSTUVWXYZ"
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"abcdefghijklmnopqrstuvwxyz"
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"0123456789+/";
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bool Base64::isBase64(unsigned char c) {
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return (isalnum(c) || (c == '+') || (c == '/'));
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}
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MString Base64::encode(ZString data) {
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data.push();
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data.reset();
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MString ret;
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int in_len = data.getLength();
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int i = 0;
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int j = 0;
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unsigned char char_array_3[3];
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unsigned char char_array_4[4];
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while (in_len--) {
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char_array_3[i++] = data.nextChar();
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if (i == 3) {
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char_array_4[0] = (char_array_3[0] & 0xfc) >> 2;
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char_array_4[1] = ((char_array_3[0] & 0x03) << 4) + ((char_array_3[1] & 0xf0) >> 4);
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char_array_4[2] = ((char_array_3[1] & 0x0f) << 2) + ((char_array_3[2] & 0xc0) >> 6);
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char_array_4[3] = char_array_3[2] & 0x3f;
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for(i = 0; (i <4) ; i++)
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ret.write(base64_chars[char_array_4[i]]);
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i = 0;
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}
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}
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if (i) {
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for(j = i; j < 3; j++)
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char_array_3[j] = '\0';
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char_array_4[0] = ( char_array_3[0] & 0xfc) >> 2;
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char_array_4[1] = ((char_array_3[0] & 0x03) << 4) + ((char_array_3[1] & 0xf0) >> 4);
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char_array_4[2] = ((char_array_3[1] & 0x0f) << 2) + ((char_array_3[2] & 0xc0) >> 6);
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for (j = 0; (j < i + 1); j++)
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ret.write(base64_chars[char_array_4[j]]);
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while((i++ < 3))
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ret.write('=');
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}
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data.pop();
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return ret;
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}
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MString Base64::decode(ZString b64data) {
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b64data.push();
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b64data.reset();
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int in_len = b64data.getLength();
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int i = 0;
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int j = 0;
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unsigned char char_array_4[4], char_array_3[3];
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MString ret;
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while (in_len-- && (b64data.getChar() != '=') && isBase64(b64data.getChar())) {
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char_array_4[i++] = b64data.nextChar();
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if (i ==4) {
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for (i = 0; i <4; i++)
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char_array_4[i] = base64_chars.find(char_array_4[i]);
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char_array_3[0] = ( char_array_4[0] << 2 ) + ((char_array_4[1] & 0x30) >> 4);
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char_array_3[1] = ((char_array_4[1] & 0xf) << 4) + ((char_array_4[2] & 0x3c) >> 2);
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char_array_3[2] = ((char_array_4[2] & 0x3) << 6) + char_array_4[3];
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for (i = 0; (i < 3); i++)
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ret.write(char_array_3[i]);
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i = 0;
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}
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}
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if (i) {
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for (j = 0; j < i; j++)
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char_array_4[j] = base64_chars.find(char_array_4[j]);
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char_array_3[0] = (char_array_4[0] << 2) + ((char_array_4[1] & 0x30) >> 4);
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char_array_3[1] = ((char_array_4[1] & 0xf) << 4) + ((char_array_4[2] & 0x3c) >> 2);
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for (j = 0; (j < i - 1); j++)
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ret.write(char_array_3[j]);
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}
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b64data.pop();
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return ret;
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}
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}
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